[theamk]

"Playing well with others" is very common in computers, and it translates well to meatspace too.

There are lots of programming languages that are built on coventions (for example in Python, private variables are not actually protected in any way). We rely on other programmers to know the rules and respect them. Same goes with toothpaste management system, or with deciding what should happen even you finish communal ketchup bottle.